18998053 has 2 divisors, whose sum is σ = 18998054. Its totient is φ = 18998052.

The previous prime is 18998033. The next prime is 18998093. The reversal of 18998053 is 35089981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16507969 + 2490084 = 4063^2 + 1578^2 .

It is an emirp because it is prime and its reverse (35089981) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-18998053 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18998033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9499026 + 9499027.

It is an arithmetic number, because the mean of its divisors is an integer number (9499027).

Almost surely, 2^18998053 is an apocalyptic number.

It is an amenable number.

18998053 is a deficient number, since it is larger than the sum of its proper divisors (1).

18998053 is an equidigital number, since it uses as much as digits as its factorization.

18998053 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 18998053 is about 4358.6756016019. The cubic root of 18998053 is about 266.8310498626.

The spelling of 18998053 in words is "eighteen million, nine hundred ninety-eight thousand, fifty-three".